Hyd roller and soild lifters?

[sanger rat]

Can you use a BBC hyd. roller cam with soild lifters? If so can you use a Gen 5-6 cam in a Gen4?

[Infomaniac]

Can you use a BBC hyd. roller cam with soild lifters? If so can you use a Gen 5-6 cam in a Gen4?
Yes and No
Run lash about .005 when running a solid roller lifter on a hyd ground cam. A good way to get some more performance from a hyd roller and not use to the moon spring pressures of the solid.
Gen VI cam has a step in the front for the retainer plate and the Gen IV cam gear will not bolt on.

[sanger rat]

So a Gen 5 cam is a bolt in for the Gen 4?

[Moneypitt]

Using solid lifters on a hydrolic grind will not allow the full benefit of either/or. The grinds are different, solids must be steeper ramped to close the valve lash prior to any valve action. If you use solids on a hyd. grind, there is a lack of the steep ramp, so you will lose duration. If you go the other way, the hyd. lifter on a solid grind will jump your overlap into oblivion because there is no lash to close. Use the right lifter on the right cam, anything else is just a crap shoot as to what you come out with.............MP

[sanger rat]

I have a set of soild roller lifters I would like to use in my 454 but I'm having a hard time finding a nice soild roller in the 2000-6000 rpm range for a jet boat.

[steelcomp]

I have a set of soild roller lifters I would like to use in my 454 but I'm having a hard time finding a nice soild roller in the 2000-6000 rpm range for a jet boat.
That's asking an awful lot from a cam. :clover:
Comp Cams Xtreme Energy mech. roller
p/n 11-770-8 grind no. XR274R
2200-6200 274/280 236/242 @ .05 639/646 110 deg.

[sanger rat]

Thanks, I have a older book and that one isn't in there.

[Underfunded]

" That's asking an awful lot from a cam.
Comp Cams Xtreme Energy mech. roller
p/n 11-770-8 grind no. XR274R
2200-6200 274/280 236/242 @ .05 639/646 110 deg" will a cam like this work for less then 9.5 to 1 compression?

[steelcomp]

" That's asking an awful lot from a cam.
Comp Cams Xtreme Energy mech. roller
p/n 11-770-8 grind no. XR274R
2200-6200 274/280 236/242 @ .05 639/646 110 deg" will a cam like this work for less then 9.5 to 1 compression?
Will it work? Sure, but not as well as one designed for lower comp.

[cstraub]

What heads are on this engine? The deal with a hyd roller cam and solid lifters is since the open ramps and flank rates are not as drastic you don't have to run the real high spring rates. Actually it works out to be a nice combo.
If we knew what heads on the engine, we can better judge the cam.
Chris

[steelcomp]

What heads are on this engine? The deal with a hyd roller cam and solid lifters is since the open ramps and flank rates are not as drastic you don't have to run the real high spring rates. Actually it works out to be a nice combo.
If we knew what heads on the engine, we can better judge the cam.
Chris
Not to mention a MUCH lighter lifter. :)

[cstraub]

Ah yes, the achillies heal of the hyd roller. . .mass. Just can't zing them. Restrictor pushrods help, but you still have the spring pressure issue.
Chris

[sanger rat]

454 9.5cr. 781 oval ports big valves pocket port. Dart single plane. A impeller. I really appreciate the help.

[steelcomp]

454 9.5cr. 781 oval ports big valves pocket port. Dart single plane. A impeller. I really appreciate the help.
That roller I quoted you earlier would work real nice, or there's a marine grind that is a little narrower, but would make a little more power. It's 11-706-9
285/295 254/264@.05 .638/.622 on 108deg LC. 3500-6500 rpm...this cam would like more CR.
What size carb are you running?

[sanger rat]

I have a Holley 800 DP.

[TIMINATOR]

Infomaniac and I usually don't agree on much, but in this case he is RIGHT ON! I have been using solids on hyd rlrs since Crane F**ked me on their first release of those cams in late 1986. It seems that they did all of their Dyno research for the then-new hydraulic roller smallblock cam with solid roller lifters, and then sold them with the hydraulics when Eaton finally sent them some. I was a PAYING tester for their R&D program on that deal. When after 3 different size cams, different oil weights, spring pressures, adding headers, and opening up the crossfire manafold and throttle bodies didn't do it, I got the idea about using tightly lashed solid roller lifters on it (1984 Vette). It worked perfectly, FOR 5 YEARS UNTIL I SOLD THE CAR! I relashed it about every year and a half, it allways passed smog checks, and was quiet. I called Crane right after I put the solids on it, and only then did they admit that that was the way they had R&Dd it! I haven't bought anything from CRANE since. I took it up with them again at the Street Machine Nationals in Duquoin, that summer (1987), but thats a LONG story. You have my #, call me, I have a few applicable rollers.... P.S. the COMP HYD RLR I tried in my 21 Daytona 2 years ago didn't work as advertised either. TIMINATOR